I've taken a break from automation stuff and I'm looking at media now. I've downloaded a trial of SageTV and I got an HDHomerun. I have things set up on an old Sempron 2800+ machine, which is adequate for recording and serving video (not at all for watching live HD though). The dual tuners on the HDHomerun use up 80 Mbps when bother are tuned to HD channels. This is clearly not usable unless I upgrade some parts of my network from 100 Mbps to gigabit. I have a few other issues to work out as well, but the Sage software and the HDHomerun seem to work well.